package com.zjw.yyyy2021.mmdd0927;

import java.util.Stack;

/**
 * <p>TODO</p>
 *
 * @author 郑大仙丶
 * @version V1.0.0
 * @date 2021/9/28 0:33
 */
public class MMdd0927 {

    Stack<Integer> stack1 = new Stack<Integer>();
    Stack<Integer> stack2 = new Stack<Integer>();

    public void push(int node) {
        stack1.push(node);
    }

    public int pop() {
        if(!stack2.empty()){
            return stack2.pop();
        }else{
            while(!stack1.empty()){
                stack2.push(stack1.pop());
            }
            return stack2.pop();
        }
    }
}
